/*
 * Copyright (c) 2016, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package io.siddhi.core.query.processor.stream.window;

import io.siddhi.core.query.processor.stream.AbstractStreamProcessor;
import io.siddhi.core.util.snapshot.state.State;
import io.siddhi.query.api.definition.Attribute;

import java.util.ArrayList;
import java.util.List;

/**
 * Abstract parent implementation of Processor to represent Windows. Common window behaviors will be handled
 * here through this class and different implementations should extend this
 *
 * @param <S> current state of the processor
 */
public abstract class WindowProcessor<S extends State> extends AbstractStreamProcessor<S> {


    @Override
    public List<Attribute> getReturnAttributes() {
        return new ArrayList<>(0);
    }
}
